A little over a year after Colorado and Washington legalized marijuana, more than half the states, including some in the conservative South, are considering decriminalizing the drug or legalizing it for medical or recreational use. That has set up a watershed year in the battle over whether marijuana should be as available as alcohol.

Demonstrating how marijuana is no longer a strictly partisan issue, the two states considered likeliest this year to follow Colorado and Washington in outright legalization of the drug are Oregon, dominated by liberal Democrats, and Alaska, where libertarian Republicans hold sway.

Advocates of more lenient marijuana laws say they intend to maintain the momentum from their successes, heartened by national and statewide polls showing greater public acceptance of legalizing marijuana, President Obama’s recent musings on the discriminatory effect of marijuana prosecutions and the release of guidelines by his Treasury Department intended to make it easier for banks to do business with legal marijuana businesses.

Their opponents, though, who also see this as a crucial year, are just as keen to slow the legalization drives. They are aided by a wait-and-see attitude among many governors and legislators, who seem wary of pushing ahead too quickly without seeing how the rollout of legal marijuana works in Colorado and Washington. “We feel that if Oregon or Alaska could be stopped, it would disrupt the whole narrative these groups have that legalization is inevitable,” said Kevin A. Sabet, executive director of Smart Approaches to Marijuana, which is spearheading much of the effort to stop these initiatives. “We could stop that momentum.”...

At least 14 states — including Florida, where an initiative has already qualified for the ballot — are considering new medical marijuana laws this year, according to the Marijuana Policy Project, which supports legalization, and 12 states and the District of Columbia are contemplating decriminalization, in which the drug remains illegal, but the penalties are softened or reduced to fines. Medical marijuana use is already legal in 20 states and the District of Columbia.

An even larger number of states, at least 17, have seen bills introduced or initiatives begun to legalize the drug for adult use along the lines of alcohol, the same approach used in Colorado and Washington, but most of those efforts are considered unlikely of success this year.

The allure of tax revenues is also becoming a powerful selling point in some states, particularly after Gov. John W. Hickenlooper of Colorado said last week that taxes from legal marijuana sales would be $134 million in the coming fiscal year, much higher than had been predicted when the measure was passed in 2012....

Opponents of legalization, meanwhile, are mobilizing across the country to slow the momentum, keeping a sharp eye on Colorado for any problems in the rollout of the new law there. “Legalization almost had to happen in order for people to wake up and realize they don’t want it,” Mr. Sabet said. “In a strange way, we feel legalization in a few states could be a blessing.”...

While much of the recent attention has focused on these legalization efforts, medical marijuana may also cross what its backers consider an important threshold this year — most notably in the South where Alabama, Georgia and South Carolina are among the states considering such laws....

Election data, compiled by Just Say Now, a pro-marijuana group, showed that the percentage of the vote that came from people under 30 increased significantly from 2008 to 2012 in states that had marijuana initiatives. This youth vote, predominantly Democratic, rose to 20 percent from 14 percent in Colorado, and to 22 percent from 10 percent in Washington, both far above the 1 percent rise in the national youth vote....

A narrow majority of Americans — 51 percent — believe marijuana should be legal, according to a New York Times/CBS News poll conducted last week, matching the result in a CBS News poll the previous month. In 1979, when The Times and CBS first asked the question, only 27 percent wanted cannabis legalized. There were stark differences in the new poll, though. While 72 percent of people under 30 favored legalization, only 29 percent of those over 65 agreed. And while about a third of Republicans now favored legalization, this was far below the 60 percent of Democrats and 54 percent of independents who did so....

Mason Tvert, director of communications for the Marijuana Policy Project, a leading advocate for legalizing marijuana, said campaigns were already underway to stage aggressive legalization drives in several states over the next couple of years, including Arizona, California, Maine, Massachusetts, Nevada, and possibly Montana. “It is certainly important to maintain the momentum,” Mr. Tvert said, “But I don’t think we can look at any one election cycle and see what the future holds. This is going to be a multiyear effort.”

I do not disagree with the general view that 2014 is a "watershed year" concerning discussion and debate over marijuana reform (and this was one big reason I developed a taught a seminar on the topic at my law school last Fall). But, as the title of this post highlights, I have come to believe that a much broader set of social and political forces help account for modern marijuana reform movement. The forces include, inter alia, a growing distrust of all government among both left-leaning and right-leaning opinion leaders over the last 15 years, growing evidence that the many aspects of the drug war may do more harm than some drugs, the failure of Big Pharma to provide effective pain relief (without too many side effects) to many who suffer from a range of serious medial problems, and changing labor and economic realities that change to cost/benefit realities of pot prohibition versus pot regulation.

I am happy to see the front-page of the NY Times discuss the various 2014 short-term realities that may impact marijuana reform over the next few years. But I would be especially eager to hear from readers concerning what they think are broader social and political forces that will shape these stories over the next few decades.